# Relationship history for MSHA mine 3002633

Current hierarchy: **Thomas S  Biamonte → SHELBY CRUSHED STONE INC → SHELBY CRUSHED STONE INC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Shelby Crushed Stone Products Inc → SHELBY CRUSHED STONE INC; 1984-01-01 to 2005-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Thomas E  Carter → SHELBY CRUSHED STONE INC; 1984-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas E  Carter → Shelby Crushed Stone Products Inc; 1984-01-01 to 2005-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Shelby Crushed Stone Inc → SHELBY CRUSHED STONE INC; 2005-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas S  Biamonte → SHELBY CRUSHED STONE INC; 2005-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas S  Biamonte → Shelby Crushed Stone Inc; 2005-05-19 to current/open; source msha-controller-operator-history